Thumb brace



FIG. 1 is a frontal view of a thumb brace showing our new design;

FIG. 2 is a rear view of the thumb brace shown in FIG. 1;

FIG. 3 is a top plan view of the thumb brace shown in FIG. 1;

FIG. 4 is a bottom plan view of the third brace shown in FIG. 1;

FIG. 5 is a left side elevation view of the thumb brace shown in FIG. 1; and,

FIG. 6 is a right side elevational view of the thumb brace shown in FIG. 1. 

The ornamental design for a thumb brace, substantially as shown as described. 